Reduce image file size in your browser — no upload to server, 100% private.
Why Compress Images?
Large images slow down websites, increasing bounce rate and hurting SEO rankings. Compressed images load faster, improve Core Web Vitals scores, and provide a better user experience on mobile networks. Our tool compresses images entirely in your browser — nothing is uploaded to any server.
How Image Compression Works
This tool uses the HTML5 Canvas API to redraw your image at a specified JPEG quality level. Quality 80% is the sweet spot — typically reducing file size by 40–70% with minimal visible quality loss. For web images, quality 60–80% is recommended.
Tips for Best Results
- For web use: quality 70–80% gives the best size/quality balance
- For print: use quality 90–100% to preserve fine details
- PNG screenshots convert well to compressed JPEG
- Photos with many colors compress better than flat illustrations
Frequently Asked Questions
Is my image uploaded to a server?
No. All compression happens in your browser using JavaScript and HTML5 Canvas. Your image never leaves your device.
What image formats are supported?
You can input JPG, PNG, WebP, GIF, and BMP images. The output is always a JPEG file.
How much can image size be reduced?
Typically 30–80% depending on the source image and quality setting. Photos compress better than screenshots with text.
Does compression reduce image dimensions?
No. This tool only reduces file size by adjusting JPEG quality. The pixel dimensions remain identical.
Why does PNG output as JPEG?
JPEG compression is lossy but highly effective for photos. If you need transparency preserved, the background will become white in the compressed JPEG.